Question
In: Chemistry
An acidic buffer solution can be prepared from phosphoric acid and dihydrogen phosphate. a. What is...
An acidic buffer solution can be prepared from phosphoric acid and dihydrogen phosphate.
a. What is the pH of solution prepared by mixing 23.5g of NaH 2 PO 4 and 15.0mL of concentrated phosphoric acid (14.7M) in enough water to give 1.25L of solution?
b. By how much does the pH of this buffer solution change on the addition of 3.50 mL of 6.0M HCl?
Solutions
queen_honey_blossom answered 1 year agoRelated Solutions
A student dilutes 50 mL of a phosphoric acid-dihydrogen phosphate buffer solution to a final volume...
A student dilutes 50 mL of a phosphoric acid-dihydrogen
phosphate buffer solution to a final volume of 100 ml.
Will the pH of the buffer change noticeably? (Use Henderson
-Hasselbeck conceptually )
For the same dilution above will the buffer capacity change
?
Calculations: A 50.0 mL sample of a 0.100 M phosphoric acid,
H3PO4 is titrated with 0.100 M NaOH.
Identify the major chemical species present and calculate the pH
at these four points (first consider the titration curve)...
10) You want to create a buffer using phosphoric acid and Sodium Dihydrogen Phosphate. what is...
10) You want to create a buffer using phosphoric acid and Sodium
Dihydrogen Phosphate. what is the best pH at which to make the
buffer? using that pH and a concentration of 1M. Determine the
molar concentrations of each component (acid and base) needed to
make the buffer. If you need 100mL of the buffer, how many mL of
2.5 M phosphoric acid will you need? How many grams of the Sodium
Dihydrogen Phosphate do you need?
11) using the...
500mL of a dilute phosphoric acid solution was prepared. If the concentration dropped from 36% to...
500mL of a dilute phosphoric acid solution was prepared. If the
concentration dropped from 36% to 2%, how much water was needed for
the dilution?
A solution was prepared by dissolving 0.0258 mol disodium phosphate in 500.0mL of deionized water. Phosphoric...
A solution was prepared by dissolving 0.0258 mol disodium
phosphate in 500.0mL of deionized water. Phosphoric acid has the
following pKa values: pKa1 = 2.148 , pKa2 = 7.198 , pKa3 =
12.375.
a) What was the pH of the resulting solution?
b) What was the concentration of H2PO4- in the solution?
A biochemist prepares two stocks of sodium phosphate buffer by titrating phosphoric acid with sodium hydroxide....
A biochemist prepares two stocks of sodium phosphate buffer by
titrating phosphoric acid with sodium hydroxide. She prepares a
0.10 M solution of sodium phosphate buffer at pH 2.15, and she
prepares a 0.10 M solution of sodium phosphate buffer at pH 7.20.
If she mixes 50. mL of the pH 2.15 buffer with 30. mL of the pH
7.20 buffer, what will be the pH of the resulting solution? Recall
that the pKas of phosphoric acid are 2.15, 7.20,...
A biochemist prepares two stocks of sodium phosphate buffer by titrating phosphoric acid with sodium hydroxide....
A biochemist prepares two stocks of sodium phosphate buffer by
titrating phosphoric acid with sodium hydroxide. She prepares a
0.10 M solution of sodium phosphate buffer at pH 2.15, and she
prepares a 0.10 M solution of sodium phosphate buffer at pH 7.20.
If she mixes 50. mL of the pH 2.15 buffer with 30. mL of the pH
7.20 buffer, what will be the pH of the resulting solution? Recall
that the pKas of phosphoric acid are 2.15, 7.20,...
In a buffer solution prepared from 10 mL of 3.0 M benzoic acid (HC6H5CO2) added to...
In a buffer solution prepared from 10 mL of 3.0 M benzoic acid
(HC6H5CO2) added to 20 mL of a 2.0
M sodium benzoate (NaC6H5CO2) and
diluted to a total volume of 200mL- Calculate each of the
following:
a. The original pH of the buffer solution
b. The pH upon addition of 8.0 mL of 2.0 M NaOH to part a
c. The pH upon addition of 30.0 mL of 2.0 M HCl to part a
A buffer solution is prepared by mixing 35mL of 0.18M CHCOOH (acetic acid) and 25mL of...
A buffer solution is prepared by mixing 35mL of 0.18M CHCOOH
(acetic acid) and 25mL of 0.23M NaCH3COO (sodium
acetate). Fine the change in pH when 5.0 mL of 0.12M HCl is
added.
Been stuck on this one for a while. If you can show step by step
that would help so much!
What is the concentration of PO43- in a 4.79 M solution of phosphoric acid (H3PO4) at...
What is the concentration of PO43- in a
4.79 M solution of phosphoric acid (H3PO4) at
equilibrium?
ka1=7.5e-3 ka2=6.2e-8 ka3=4.8e-13
please show work
*It's not 5.93e-4 or 3.44e-19
Calculate the pH of a 0.1620 M aqueous solution of sodium dihydrogen phosphate, NaH2PO4. Use the...
Calculate the pH of a 0.1620 M aqueous solution
of sodium dihydrogen phosphate,
NaH2PO4.
Use the Tables link on the toolbar for any
equilibrium constants that are required.
pH =
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